1caab277bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2f76ee892STomi Valkeinen /*
3f76ee892STomi Valkeinen * linux/drivers/video/omap2/dss/dispc_coefs.c
4f76ee892STomi Valkeinen *
5f76ee892STomi Valkeinen * Copyright (C) 2011 Texas Instruments
6f76ee892STomi Valkeinen * Author: Chandrabhanu Mahapatra <cmahapatra@ti.com>
7f76ee892STomi Valkeinen */
8f76ee892STomi Valkeinen
9f76ee892STomi Valkeinen #include <linux/kernel.h>
1062d9e44eSPeter Ujfalusi #include <video/omapfb_dss.h>
11f76ee892STomi Valkeinen
12f76ee892STomi Valkeinen #include "dispc.h"
13f76ee892STomi Valkeinen
14f76ee892STomi Valkeinen static const struct dispc_coef coef3_M8[8] = {
15f76ee892STomi Valkeinen { 0, 0, 128, 0, 0 },
16f76ee892STomi Valkeinen { 0, -4, 123, 9, 0 },
17f76ee892STomi Valkeinen { 0, -4, 108, 24, 0 },
18f76ee892STomi Valkeinen { 0, -2, 87, 43, 0 },
19f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
20f76ee892STomi Valkeinen { 0, 43, 87, -2, 0 },
21f76ee892STomi Valkeinen { 0, 24, 108, -4, 0 },
22f76ee892STomi Valkeinen { 0, 9, 123, -4, 0 },
23f76ee892STomi Valkeinen };
24f76ee892STomi Valkeinen
25f76ee892STomi Valkeinen static const struct dispc_coef coef3_M9[8] = {
26f76ee892STomi Valkeinen { 0, 6, 116, 6, 0 },
27f76ee892STomi Valkeinen { 0, 0, 112, 16, 0 },
28f76ee892STomi Valkeinen { 0, -2, 100, 30, 0 },
29f76ee892STomi Valkeinen { 0, -2, 83, 47, 0 },
30f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
31f76ee892STomi Valkeinen { 0, 47, 83, -2, 0 },
32f76ee892STomi Valkeinen { 0, 30, 100, -2, 0 },
33f76ee892STomi Valkeinen { 0, 16, 112, 0, 0 },
34f76ee892STomi Valkeinen };
35f76ee892STomi Valkeinen
36f76ee892STomi Valkeinen static const struct dispc_coef coef3_M10[8] = {
37f76ee892STomi Valkeinen { 0, 10, 108, 10, 0 },
38f76ee892STomi Valkeinen { 0, 3, 104, 21, 0 },
39f76ee892STomi Valkeinen { 0, 0, 94, 34, 0 },
40f76ee892STomi Valkeinen { 0, -1, 80, 49, 0 },
41f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
42f76ee892STomi Valkeinen { 0, 49, 80, -1, 0 },
43f76ee892STomi Valkeinen { 0, 34, 94, 0, 0 },
44f76ee892STomi Valkeinen { 0, 21, 104, 3, 0 },
45f76ee892STomi Valkeinen };
46f76ee892STomi Valkeinen
47f76ee892STomi Valkeinen static const struct dispc_coef coef3_M11[8] = {
48f76ee892STomi Valkeinen { 0, 14, 100, 14, 0 },
49f76ee892STomi Valkeinen { 0, 6, 98, 24, 0 },
50f76ee892STomi Valkeinen { 0, 2, 90, 36, 0 },
51f76ee892STomi Valkeinen { 0, 0, 78, 50, 0 },
52f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
53f76ee892STomi Valkeinen { 0, 50, 78, 0, 0 },
54f76ee892STomi Valkeinen { 0, 36, 90, 2, 0 },
55f76ee892STomi Valkeinen { 0, 24, 98, 6, 0 },
56f76ee892STomi Valkeinen };
57f76ee892STomi Valkeinen
58f76ee892STomi Valkeinen static const struct dispc_coef coef3_M12[8] = {
59f76ee892STomi Valkeinen { 0, 16, 96, 16, 0 },
60f76ee892STomi Valkeinen { 0, 9, 93, 26, 0 },
61f76ee892STomi Valkeinen { 0, 4, 86, 38, 0 },
62f76ee892STomi Valkeinen { 0, 1, 76, 51, 0 },
63f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
64f76ee892STomi Valkeinen { 0, 51, 76, 1, 0 },
65f76ee892STomi Valkeinen { 0, 38, 86, 4, 0 },
66f76ee892STomi Valkeinen { 0, 26, 93, 9, 0 },
67f76ee892STomi Valkeinen };
68f76ee892STomi Valkeinen
69f76ee892STomi Valkeinen static const struct dispc_coef coef3_M13[8] = {
70f76ee892STomi Valkeinen { 0, 18, 92, 18, 0 },
71f76ee892STomi Valkeinen { 0, 10, 90, 28, 0 },
72f76ee892STomi Valkeinen { 0, 5, 83, 40, 0 },
73f76ee892STomi Valkeinen { 0, 1, 75, 52, 0 },
74f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
75f76ee892STomi Valkeinen { 0, 52, 75, 1, 0 },
76f76ee892STomi Valkeinen { 0, 40, 83, 5, 0 },
77f76ee892STomi Valkeinen { 0, 28, 90, 10, 0 },
78f76ee892STomi Valkeinen };
79f76ee892STomi Valkeinen
80f76ee892STomi Valkeinen static const struct dispc_coef coef3_M14[8] = {
81f76ee892STomi Valkeinen { 0, 20, 88, 20, 0 },
82f76ee892STomi Valkeinen { 0, 12, 86, 30, 0 },
83f76ee892STomi Valkeinen { 0, 6, 81, 41, 0 },
84f76ee892STomi Valkeinen { 0, 2, 74, 52, 0 },
85f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
86f76ee892STomi Valkeinen { 0, 52, 74, 2, 0 },
87f76ee892STomi Valkeinen { 0, 41, 81, 6, 0 },
88f76ee892STomi Valkeinen { 0, 30, 86, 12, 0 },
89f76ee892STomi Valkeinen };
90f76ee892STomi Valkeinen
91f76ee892STomi Valkeinen static const struct dispc_coef coef3_M16[8] = {
92f76ee892STomi Valkeinen { 0, 22, 84, 22, 0 },
93f76ee892STomi Valkeinen { 0, 14, 82, 32, 0 },
94f76ee892STomi Valkeinen { 0, 8, 78, 42, 0 },
95f76ee892STomi Valkeinen { 0, 3, 72, 53, 0 },
96f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
97f76ee892STomi Valkeinen { 0, 53, 72, 3, 0 },
98f76ee892STomi Valkeinen { 0, 42, 78, 8, 0 },
99f76ee892STomi Valkeinen { 0, 32, 82, 14, 0 },
100f76ee892STomi Valkeinen };
101f76ee892STomi Valkeinen
102f76ee892STomi Valkeinen static const struct dispc_coef coef3_M19[8] = {
103f76ee892STomi Valkeinen { 0, 24, 80, 24, 0 },
104f76ee892STomi Valkeinen { 0, 16, 79, 33, 0 },
105f76ee892STomi Valkeinen { 0, 9, 76, 43, 0 },
106f76ee892STomi Valkeinen { 0, 4, 70, 54, 0 },
107f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
108f76ee892STomi Valkeinen { 0, 54, 70, 4, 0 },
109f76ee892STomi Valkeinen { 0, 43, 76, 9, 0 },
110f76ee892STomi Valkeinen { 0, 33, 79, 16, 0 },
111f76ee892STomi Valkeinen };
112f76ee892STomi Valkeinen
113f76ee892STomi Valkeinen static const struct dispc_coef coef3_M22[8] = {
114f76ee892STomi Valkeinen { 0, 25, 78, 25, 0 },
115f76ee892STomi Valkeinen { 0, 17, 77, 34, 0 },
116f76ee892STomi Valkeinen { 0, 10, 74, 44, 0 },
117f76ee892STomi Valkeinen { 0, 5, 69, 54, 0 },
118f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
119f76ee892STomi Valkeinen { 0, 54, 69, 5, 0 },
120f76ee892STomi Valkeinen { 0, 44, 74, 10, 0 },
121f76ee892STomi Valkeinen { 0, 34, 77, 17, 0 },
122f76ee892STomi Valkeinen };
123f76ee892STomi Valkeinen
124f76ee892STomi Valkeinen static const struct dispc_coef coef3_M26[8] = {
125f76ee892STomi Valkeinen { 0, 26, 76, 26, 0 },
126f76ee892STomi Valkeinen { 0, 19, 74, 35, 0 },
127f76ee892STomi Valkeinen { 0, 11, 72, 45, 0 },
128f76ee892STomi Valkeinen { 0, 5, 69, 54, 0 },
129f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
130f76ee892STomi Valkeinen { 0, 54, 69, 5, 0 },
131f76ee892STomi Valkeinen { 0, 45, 72, 11, 0 },
132f76ee892STomi Valkeinen { 0, 35, 74, 19, 0 },
133f76ee892STomi Valkeinen };
134f76ee892STomi Valkeinen
135f76ee892STomi Valkeinen static const struct dispc_coef coef3_M32[8] = {
136f76ee892STomi Valkeinen { 0, 27, 74, 27, 0 },
137f76ee892STomi Valkeinen { 0, 19, 73, 36, 0 },
138f76ee892STomi Valkeinen { 0, 12, 71, 45, 0 },
139f76ee892STomi Valkeinen { 0, 6, 68, 54, 0 },
140f76ee892STomi Valkeinen { 0, 64, 64, 0, 0 },
141f76ee892STomi Valkeinen { 0, 54, 68, 6, 0 },
142f76ee892STomi Valkeinen { 0, 45, 71, 12, 0 },
143f76ee892STomi Valkeinen { 0, 36, 73, 19, 0 },
144f76ee892STomi Valkeinen };
145f76ee892STomi Valkeinen
146f76ee892STomi Valkeinen static const struct dispc_coef coef5_M8[8] = {
147f76ee892STomi Valkeinen { 0, 0, 128, 0, 0 },
148f76ee892STomi Valkeinen { -2, 14, 125, -10, 1 },
149f76ee892STomi Valkeinen { -6, 33, 114, -15, 2 },
150f76ee892STomi Valkeinen { -10, 55, 98, -16, 1 },
151f76ee892STomi Valkeinen { 0, -14, 78, 78, -14 },
152f76ee892STomi Valkeinen { 1, -16, 98, 55, -10 },
153f76ee892STomi Valkeinen { 2, -15, 114, 33, -6 },
154f76ee892STomi Valkeinen { 1, -10, 125, 14, -2 },
155f76ee892STomi Valkeinen };
156f76ee892STomi Valkeinen
157f76ee892STomi Valkeinen static const struct dispc_coef coef5_M9[8] = {
158f76ee892STomi Valkeinen { -3, 10, 114, 10, -3 },
159f76ee892STomi Valkeinen { -6, 24, 111, 0, -1 },
160f76ee892STomi Valkeinen { -8, 40, 103, -7, 0 },
161f76ee892STomi Valkeinen { -11, 58, 91, -11, 1 },
162f76ee892STomi Valkeinen { 0, -12, 76, 76, -12 },
163f76ee892STomi Valkeinen { 1, -11, 91, 58, -11 },
164f76ee892STomi Valkeinen { 0, -7, 103, 40, -8 },
165f76ee892STomi Valkeinen { -1, 0, 111, 24, -6 },
166f76ee892STomi Valkeinen };
167f76ee892STomi Valkeinen
168f76ee892STomi Valkeinen static const struct dispc_coef coef5_M10[8] = {
169f76ee892STomi Valkeinen { -4, 18, 100, 18, -4 },
170f76ee892STomi Valkeinen { -6, 30, 99, 8, -3 },
171f76ee892STomi Valkeinen { -8, 44, 93, 0, -1 },
172f76ee892STomi Valkeinen { -9, 58, 84, -5, 0 },
173f76ee892STomi Valkeinen { 0, -8, 72, 72, -8 },
174f76ee892STomi Valkeinen { 0, -5, 84, 58, -9 },
175f76ee892STomi Valkeinen { -1, 0, 93, 44, -8 },
176f76ee892STomi Valkeinen { -3, 8, 99, 30, -6 },
177f76ee892STomi Valkeinen };
178f76ee892STomi Valkeinen
179f76ee892STomi Valkeinen static const struct dispc_coef coef5_M11[8] = {
180f76ee892STomi Valkeinen { -5, 23, 92, 23, -5 },
181f76ee892STomi Valkeinen { -6, 34, 90, 13, -3 },
182f76ee892STomi Valkeinen { -6, 45, 85, 6, -2 },
183f76ee892STomi Valkeinen { -6, 57, 78, 0, -1 },
184f76ee892STomi Valkeinen { 0, -4, 68, 68, -4 },
185f76ee892STomi Valkeinen { -1, 0, 78, 57, -6 },
186f76ee892STomi Valkeinen { -2, 6, 85, 45, -6 },
187f76ee892STomi Valkeinen { -3, 13, 90, 34, -6 },
188f76ee892STomi Valkeinen };
189f76ee892STomi Valkeinen
190f76ee892STomi Valkeinen static const struct dispc_coef coef5_M12[8] = {
191f76ee892STomi Valkeinen { -4, 26, 84, 26, -4 },
192f76ee892STomi Valkeinen { -5, 36, 82, 18, -3 },
193f76ee892STomi Valkeinen { -4, 46, 78, 10, -2 },
194f76ee892STomi Valkeinen { -3, 55, 72, 5, -1 },
195f76ee892STomi Valkeinen { 0, 0, 64, 64, 0 },
196f76ee892STomi Valkeinen { -1, 5, 72, 55, -3 },
197f76ee892STomi Valkeinen { -2, 10, 78, 46, -4 },
198f76ee892STomi Valkeinen { -3, 18, 82, 36, -5 },
199f76ee892STomi Valkeinen };
200f76ee892STomi Valkeinen
201f76ee892STomi Valkeinen static const struct dispc_coef coef5_M13[8] = {
202f76ee892STomi Valkeinen { -3, 28, 78, 28, -3 },
203f76ee892STomi Valkeinen { -3, 37, 76, 21, -3 },
204f76ee892STomi Valkeinen { -2, 45, 73, 14, -2 },
205f76ee892STomi Valkeinen { 0, 53, 68, 8, -1 },
206f76ee892STomi Valkeinen { 0, 3, 61, 61, 3 },
207f76ee892STomi Valkeinen { -1, 8, 68, 53, 0 },
208f76ee892STomi Valkeinen { -2, 14, 73, 45, -2 },
209f76ee892STomi Valkeinen { -3, 21, 76, 37, -3 },
210f76ee892STomi Valkeinen };
211f76ee892STomi Valkeinen
212f76ee892STomi Valkeinen static const struct dispc_coef coef5_M14[8] = {
213f76ee892STomi Valkeinen { -2, 30, 72, 30, -2 },
214f76ee892STomi Valkeinen { -1, 37, 71, 23, -2 },
215f76ee892STomi Valkeinen { 0, 45, 69, 16, -2 },
216f76ee892STomi Valkeinen { 3, 52, 64, 10, -1 },
217f76ee892STomi Valkeinen { 0, 6, 58, 58, 6 },
218f76ee892STomi Valkeinen { -1, 10, 64, 52, 3 },
219f76ee892STomi Valkeinen { -2, 16, 69, 45, 0 },
220f76ee892STomi Valkeinen { -2, 23, 71, 37, -1 },
221f76ee892STomi Valkeinen };
222f76ee892STomi Valkeinen
223f76ee892STomi Valkeinen static const struct dispc_coef coef5_M16[8] = {
224f76ee892STomi Valkeinen { 0, 31, 66, 31, 0 },
225f76ee892STomi Valkeinen { 1, 38, 65, 25, -1 },
226f76ee892STomi Valkeinen { 3, 44, 62, 20, -1 },
227f76ee892STomi Valkeinen { 6, 49, 59, 14, 0 },
228f76ee892STomi Valkeinen { 0, 10, 54, 54, 10 },
229f76ee892STomi Valkeinen { 0, 14, 59, 49, 6 },
230f76ee892STomi Valkeinen { -1, 20, 62, 44, 3 },
231f76ee892STomi Valkeinen { -1, 25, 65, 38, 1 },
232f76ee892STomi Valkeinen };
233f76ee892STomi Valkeinen
234f76ee892STomi Valkeinen static const struct dispc_coef coef5_M19[8] = {
235f76ee892STomi Valkeinen { 3, 32, 58, 32, 3 },
236f76ee892STomi Valkeinen { 4, 38, 58, 27, 1 },
237f76ee892STomi Valkeinen { 7, 42, 55, 23, 1 },
238f76ee892STomi Valkeinen { 10, 46, 54, 18, 0 },
239f76ee892STomi Valkeinen { 0, 14, 50, 50, 14 },
240f76ee892STomi Valkeinen { 0, 18, 54, 46, 10 },
241f76ee892STomi Valkeinen { 1, 23, 55, 42, 7 },
242f76ee892STomi Valkeinen { 1, 27, 58, 38, 4 },
243f76ee892STomi Valkeinen };
244f76ee892STomi Valkeinen
245f76ee892STomi Valkeinen static const struct dispc_coef coef5_M22[8] = {
246f76ee892STomi Valkeinen { 4, 33, 54, 33, 4 },
247f76ee892STomi Valkeinen { 6, 37, 54, 28, 3 },
248f76ee892STomi Valkeinen { 9, 41, 53, 24, 1 },
249f76ee892STomi Valkeinen { 12, 45, 51, 20, 0 },
250f76ee892STomi Valkeinen { 0, 16, 48, 48, 16 },
251f76ee892STomi Valkeinen { 0, 20, 51, 45, 12 },
252f76ee892STomi Valkeinen { 1, 24, 53, 41, 9 },
253f76ee892STomi Valkeinen { 3, 28, 54, 37, 6 },
254f76ee892STomi Valkeinen };
255f76ee892STomi Valkeinen
256f76ee892STomi Valkeinen static const struct dispc_coef coef5_M26[8] = {
257f76ee892STomi Valkeinen { 6, 33, 50, 33, 6 },
258f76ee892STomi Valkeinen { 8, 36, 51, 29, 4 },
259f76ee892STomi Valkeinen { 11, 40, 50, 25, 2 },
260f76ee892STomi Valkeinen { 14, 43, 48, 22, 1 },
261f76ee892STomi Valkeinen { 0, 18, 46, 46, 18 },
262f76ee892STomi Valkeinen { 1, 22, 48, 43, 14 },
263f76ee892STomi Valkeinen { 2, 25, 50, 40, 11 },
264f76ee892STomi Valkeinen { 4, 29, 51, 36, 8 },
265f76ee892STomi Valkeinen };
266f76ee892STomi Valkeinen
267f76ee892STomi Valkeinen static const struct dispc_coef coef5_M32[8] = {
268f76ee892STomi Valkeinen { 7, 33, 48, 33, 7 },
269f76ee892STomi Valkeinen { 10, 36, 48, 29, 5 },
270f76ee892STomi Valkeinen { 13, 39, 47, 26, 3 },
271f76ee892STomi Valkeinen { 16, 42, 46, 23, 1 },
272f76ee892STomi Valkeinen { 0, 19, 45, 45, 19 },
273f76ee892STomi Valkeinen { 1, 23, 46, 42, 16 },
274f76ee892STomi Valkeinen { 3, 26, 47, 39, 13 },
275f76ee892STomi Valkeinen { 5, 29, 48, 36, 10 },
276f76ee892STomi Valkeinen };
277f76ee892STomi Valkeinen
dispc_ovl_get_scale_coef(int inc,int five_taps)278f76ee892STomi Valkeinen const struct dispc_coef *dispc_ovl_get_scale_coef(int inc, int five_taps)
279f76ee892STomi Valkeinen {
280f76ee892STomi Valkeinen int i;
281f76ee892STomi Valkeinen static const struct {
282f76ee892STomi Valkeinen int Mmin;
283f76ee892STomi Valkeinen int Mmax;
284f76ee892STomi Valkeinen const struct dispc_coef *coef_3;
285f76ee892STomi Valkeinen const struct dispc_coef *coef_5;
286f76ee892STomi Valkeinen } coefs[] = {
287f76ee892STomi Valkeinen { 27, 32, coef3_M32, coef5_M32 },
288f76ee892STomi Valkeinen { 23, 26, coef3_M26, coef5_M26 },
289f76ee892STomi Valkeinen { 20, 22, coef3_M22, coef5_M22 },
290f76ee892STomi Valkeinen { 17, 19, coef3_M19, coef5_M19 },
291f76ee892STomi Valkeinen { 15, 16, coef3_M16, coef5_M16 },
292f76ee892STomi Valkeinen { 14, 14, coef3_M14, coef5_M14 },
293f76ee892STomi Valkeinen { 13, 13, coef3_M13, coef5_M13 },
294f76ee892STomi Valkeinen { 12, 12, coef3_M12, coef5_M12 },
295f76ee892STomi Valkeinen { 11, 11, coef3_M11, coef5_M11 },
296f76ee892STomi Valkeinen { 10, 10, coef3_M10, coef5_M10 },
297f76ee892STomi Valkeinen { 9, 9, coef3_M9, coef5_M9 },
298f76ee892STomi Valkeinen { 4, 8, coef3_M8, coef5_M8 },
299f76ee892STomi Valkeinen /*
300f76ee892STomi Valkeinen * When upscaling more than two times, blockiness and outlines
301f76ee892STomi Valkeinen * around the image are observed when M8 tables are used. M11,
302f76ee892STomi Valkeinen * M16 and M19 tables are used to prevent this.
303f76ee892STomi Valkeinen */
304f76ee892STomi Valkeinen { 3, 3, coef3_M11, coef5_M11 },
305f76ee892STomi Valkeinen { 2, 2, coef3_M16, coef5_M16 },
306f76ee892STomi Valkeinen { 0, 1, coef3_M19, coef5_M19 },
307f76ee892STomi Valkeinen };
308f76ee892STomi Valkeinen
309f76ee892STomi Valkeinen inc /= 128;
310f76ee892STomi Valkeinen for (i = 0; i < ARRAY_SIZE(coefs); ++i)
311f76ee892STomi Valkeinen if (inc >= coefs[i].Mmin && inc <= coefs[i].Mmax)
312f76ee892STomi Valkeinen return five_taps ? coefs[i].coef_5 : coefs[i].coef_3;
313f76ee892STomi Valkeinen return NULL;
314f76ee892STomi Valkeinen }
315